Method and apparatus for maintaining a dynamic logical ring in a token passing LAN
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United States of America Patent
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-
May 17, 1988
Grant Date -
N/A
app pub date -
Nov 27, 1985
filing date -
Nov 27, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention comprises a local area network wherein a network control center is provided to maintain a dynamic logical ring. In accordance with the method of the present invention, the local area network is provided with a transmission medium having first and second channels, wherein prospective entrants to the logical ring are solicited over the first channel and wherein information transfer among BIUs occurs over the second channel. The network control center is provided for continuously soliciting successors and resolving contentions over the first channel. Further, the network control center is adapted to add entering stations to the logical ring by receiving the token and transmitting next neighbor packets over the second channel. Additionally, the network control center may be adapted for monitoring communications over the second channel to determine when a station has received the token and failed and, thereafter, to reestablish the logical ring.
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